Installing Virtubox Guest Additions in Ubuntu Guest Machines

  1. Install the needed packages to create kernel modules:
    sudo apt-get install dkms build-essential linux-headers-generic 
  2. Press the Host+ D key combination or click on the Devices menu and choose the Install Guest Additions… option.
    Install Guest Additions...
  3. Mount the Guest Additions iso CD image:
    sudo mount -t iso9660 /dev/cdrom /media/cdrom

    mount: block device /dev/sr0 is write-protected, mounting read-only

  4. Run the installation script
    sudo /media/cdrom/
  5. Restart the guest machine.

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